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Author Topic: Rio Grande 8454 Buzzing Noise  (Read 156 times)

Andy77

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Rio Grande 8454 Buzzing Noise
« on: March 07, 2018, 07:05:10 pm »
I bought a Rio Grande 8454 at an auction last weekend.  It makes a rather loud buzzing noise when I run it.  I don't know the name of the parts very well but would say it is the e-unit.  The noise is not coming from the motor.  Any thoughts on what is causing the noise and how it can be fixed?

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TrainLarry

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Re: Rio Grande 8454 Buzzing Noise
« Reply #1 on: March 07, 2018, 09:03:18 pm »
The buzzing is from the E-Unit. The old E-Units all buzz to a certain extent and is part of the Lionel experience.

The only way to eliminate the buzz is to replace the E-unit with an electronic reverse board.

Dallee Electronics makes such boards.
https://www.dallee.com/Electronic-Reverse-Unit-E-Unit-4-Amp-AC-or-DC-motors-400

Larry

Andy77

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Re: Rio Grande 8454 Buzzing Noise
« Reply #2 on: March 16, 2018, 08:12:14 pm »
Thanks.  At the same auction I bought a 1664 with tender.  It was in very bad shape.  Motor was locked up and had rust issues.  I really just wanted it for parts out of the tender.  The engine looks good so I decided to tear into it.  The e-unit is definitely shot.  I got the motor cleaned up and was trying to bypass the e-unit just to see if I could get the motor to work but so far no success.  Should I be able to bypass the e-unit to make the motor run?  If so but itís not working any thoughts on why I canít get any response from the motor?

TrainLarry

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Re: Rio Grande 8454 Buzzing Noise
« Reply #3 on: March 17, 2018, 02:13:43 pm »
To get the motor to run without the E-Unit, disconnect all the E-Unit wires from the motor. The power wire from the pickups goes to one brush connection. The other brush connection gets connected to one field connection. The other field connection gets connected to ground. The motor will run when power is applied. To reverse the motor direction, switch the connections to the brushes.

Larry

 

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